This chapter addresses structures, uses of land, and uses of structures that were lawful before this title was adopted, but that would be prohibited, regulated, or restricted under the terms of this title as it may be amended, and provides:
Nonconformities shall be regulated in the following categories:
A particular property could be regulated as either or both category.
D.C. Mun. Regs. tit. 11, r. 11-C200